About Crystal
Crystal SAT is a free, student-built SAT prep platform built around one idea: practice with SAT-style questions, learn from every mistake, and keep improving. Our question bank spans every SAT math domain, Algebra, Advanced Math, Problem-Solving & Data Analysis, and Geometry & Trigonometry, alongside Practice Plus sets and the Amethyst challenge bank.
Every question comes with instant answer checking, step-by-step video walkthroughs, and clean math rendering so fractions, exponents, and roots always look right. Crystal SAT is built by students, for students, our team of co-founders and tutors scored in the top percentile themselves and built the tools they wished they had: a clean, distraction-free practice grid, progress tracking, flagging, and daily questions to keep you sharp. It's free, always, because great test prep shouldn't cost a fortune.
Meet the Tutors
Dan
- 1580 SAT (800 Math)
- 18 AP classes completed
- Experienced math tutor
Calculus BC, Statistics, Physics 1, Physics 2, Physics C
A.K.
Experienced math tutor who is looking to make SAT resources accessible to all for free.
Hesh
Builder
J. J.
Making the SAT more accessible
AP Gov (4), AP Precalc (N/A), IBSL Spanish (N/A), AP Stat (5), AP Calc BC (5), AP CSP (5), APUSH (4)
AP Physics C, AP Chem, AP Bio, AP Spanish, AP Language, IBSL Economics, IBSL Math, Calculus III
ACT: 36/36, PSAT: 1480/1520
Join as a Tutor
Help other students succeed while strengthening your own skills.